Finding the Fourth Proportional to 2,643.88, 3,957.62 and 1,951.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.88 : 3,957.62 = 1,951.34 : x
2. Step 2: Convert to fraction form
   2,643.88/3,957.62 = 1,951.34/x
3. Step 3: Cross multiply
   2,643.88x = 3,957.62 × 1,951.34
4. Step 4: Simplify right side
   2,643.88x = 7,722,662.21
5. Step 5: Solve for x
   x = 7,722,662.21/2,643.88
6. Step 6: Final answer
   x = 2,920.96